The structure in the production work order (PWO) gets the product name from the article (ART archive) for the specific parts included in the structure, but in the PICK application it gets the product name/text from the goods reception (SSA) document that is linked to the product. 

If a change to the product name in the article archive (ART) is made after the SSA is registered, there can be a difference to what is on the pdf picking lists and what is in the pick list details of the production work order (PWO).